US5011342B1 - - Google Patents
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- Publication number
- US5011342B1 US5011342B1 US90/002955A US16807488A US5011342B1 US 5011342 B1 US5011342 B1 US 5011342B1 US 90/002955 A US90/002955 A US 90/002955A US 16807488 A US16807488 A US 16807488A US 5011342 B1 US5011342 B1 US 5011342B1
- Authority
- US
- United States
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/18—Configuration of the drill point
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/48—Chip breakers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/905—Having stepped cutting edges
- Y10T408/906—Axially spaced
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
- Y10T408/9097—Spiral channel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/168,074 US5011342A (en) | 1988-03-14 | 1988-03-14 | Twist drill |
IL89523A IL89523A0 (en) | 1988-03-14 | 1989-03-07 | Twist drill |
ES8900899A ES2013103A6 (es) | 1988-03-14 | 1989-03-13 | Broca helicoidal perfeccionada. |
CA000593556A CA1331296C (en) | 1988-03-14 | 1989-03-13 | Twist drill |
MX015257A MX166475B (es) | 1988-03-14 | 1989-03-13 | Broca helicoidal |
PCT/US1989/001049 WO1989008520A1 (en) | 1988-03-14 | 1989-03-14 | Twist drill |
BR898907316A BR8907316A (pt) | 1988-03-14 | 1989-03-14 | Broca helicoidal |
AU34393/89A AU630608B2 (en) | 1988-03-14 | 1989-03-14 | Twist drill |
JP1504010A JPH04502884A (ja) | 1988-03-14 | 1989-03-14 | ツイストドリル |
EP19890903903 EP0406283A1 (en) | 1988-03-14 | 1989-03-14 | Twist drill |
KR1019890702116A KR900700218A (ko) | 1988-03-14 | 1989-11-14 | 트위스트 드릴 |
US07/954,141 US5442979A (en) | 1988-03-14 | 1992-09-30 | Twist drill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/168,074 US5011342A (en) | 1988-03-14 | 1988-03-14 | Twist drill |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US67490691A Continuation | 1988-03-14 | 1991-03-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
US5011342A US5011342A (en) | 1991-04-30 |
US5011342B1 true US5011342B1 (zh) | 1994-01-11 |
Family
ID=22610011
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/168,074 Expired - Lifetime US5011342A (en) | 1988-03-14 | 1988-03-14 | Twist drill |
US07/954,141 Expired - Lifetime US5442979A (en) | 1988-03-14 | 1992-09-30 | Twist drill |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/954,141 Expired - Lifetime US5442979A (en) | 1988-03-14 | 1992-09-30 | Twist drill |
Country Status (11)
Country | Link |
---|---|
US (2) | US5011342A (zh) |
EP (1) | EP0406283A1 (zh) |
JP (1) | JPH04502884A (zh) |
KR (1) | KR900700218A (zh) |
AU (1) | AU630608B2 (zh) |
BR (1) | BR8907316A (zh) |
CA (1) | CA1331296C (zh) |
ES (1) | ES2013103A6 (zh) |
IL (1) | IL89523A0 (zh) |
MX (1) | MX166475B (zh) |
WO (1) | WO1989008520A1 (zh) |
Cited By (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5288183A (en) * | 1986-08-18 | 1994-02-22 | Black & Decker Inc. | Self-centering drill bit with pilot tip |
WO1995013894A1 (en) * | 1993-11-15 | 1995-05-26 | Rogers Tool Works, Inc. | Surface decarburization of a drill bit having a refined primary cutting edge |
US5442979A (en) * | 1988-03-14 | 1995-08-22 | Greenfield Industries, Inc. | Twist drill |
US5452971A (en) * | 1994-03-08 | 1995-09-26 | Nevills; Alva D. | Rotary end cutting tool |
DE29601653U1 (de) * | 1995-03-30 | 1996-08-01 | Gühring, Jörg, Dr., 72458 Albstadt | Schneidwerkzeug |
US5609447A (en) * | 1993-11-15 | 1997-03-11 | Rogers Tool Works, Inc. | Surface decarburization of a drill bit |
US5628837A (en) * | 1993-11-15 | 1997-05-13 | Rogers Tool Works, Inc. | Surface decarburization of a drill bit having a refined primary cutting edge |
US6050754A (en) * | 1997-05-29 | 2000-04-18 | Black & Decker Inc. | Self-centering drill bit with pilot tip, and process |
US6056486A (en) * | 1998-07-15 | 2000-05-02 | Colvin; Kevin F. | Cutting tool point |
US6113321A (en) * | 1995-07-29 | 2000-09-05 | Black & Decker Inc. | Roll-forged drill bit |
US6213692B1 (en) | 1995-03-30 | 2001-04-10 | Vilab Ag | Cutting tool |
US20030188895A1 (en) * | 2002-04-03 | 2003-10-09 | Osg Corporation | Drill having construction for reducing thrust load in drilling operation, and method of manufacturing the drill |
US20040018069A1 (en) * | 2002-07-29 | 2004-01-29 | Hsiao Kang Shan Screw Co., Ltd | Self-drilling/self-tapping screw |
US20040067114A1 (en) * | 2002-10-07 | 2004-04-08 | Allied Machine & Engineering Corp. | Spot and chamfer drill insert |
US20040223823A1 (en) * | 2001-03-27 | 2004-11-11 | Allied Machine & Engineering Corp. | Drill insert geometry having V-notched web |
US20050053439A1 (en) * | 2003-09-09 | 2005-03-10 | Yuhong Wang | Two-flute twist drill |
US20060243496A1 (en) * | 2003-11-17 | 2006-11-02 | Rainer Widmann | Drilling and/or chiseling tool |
US20080166196A1 (en) * | 2005-09-14 | 2008-07-10 | Jiangsu Tiangong Tools Co., Ltd. | Drill Bit with High Performance for Chip Removal |
US20090317202A1 (en) * | 2006-06-09 | 2009-12-24 | Jiangsu Tiangong Tools Co., Ltd. | Strong high performance twist drill |
US20120301239A1 (en) * | 2011-05-23 | 2012-11-29 | Sharon-Cutwell Co., Inc. | Drilling tool |
US20140023449A1 (en) * | 2011-04-05 | 2014-01-23 | Kenth-Ove Jonsson | Cutting head comprising a drill tip and a drill having such a cutting head |
US20150025559A1 (en) * | 2013-07-17 | 2015-01-22 | Medtronic PS Medical, Inc | Surgical Burs With Geometries Having Non-Drifting and Soft Tissue Protective Characteristics |
USD734792S1 (en) | 2013-03-15 | 2015-07-21 | Black & Decker Inc. | Drill bit |
US9085074B2 (en) | 2011-03-22 | 2015-07-21 | Black & Decker Inc. | Chisels |
USD737875S1 (en) | 2013-03-15 | 2015-09-01 | Black & Decker Inc. | Drill bit |
US20160082525A1 (en) * | 2014-09-24 | 2016-03-24 | Sainty International, LLC | Multi-edge drill bit |
US9333564B2 (en) | 2013-03-15 | 2016-05-10 | Black & Decker Inc. | Drill bit |
US9452502B1 (en) * | 2013-06-26 | 2016-09-27 | The Boeing Company | Method and apparatus for reworking apertures in a workpiece with chip collection |
US20170182566A1 (en) * | 2015-12-28 | 2017-06-29 | Diamond Innovations, Inc. | Polycrystalline diamond drill bit having a laser cut chip breaker |
US20170232529A1 (en) * | 2014-09-18 | 2017-08-17 | Sumitomo Electric Hardmetal Corp. | Drill |
US20170274461A1 (en) * | 2014-09-26 | 2017-09-28 | Mitsubishi Materials Corporation | Drill and drill head |
US20170341159A1 (en) * | 2014-10-24 | 2017-11-30 | Kyocera Corporation | Drill and method for manufacturing machined product using same |
US9924952B2 (en) | 2012-04-16 | 2018-03-27 | Medtronic Ps Medical, Inc. | Surgical bur with non-paired flutes |
US20180093330A1 (en) * | 2015-11-26 | 2018-04-05 | Kennametal Inc. | Cutting tool and method for its manufacture |
US9955981B2 (en) | 2015-03-31 | 2018-05-01 | Medtronic Xomed, Inc | Surgical burs with localized auxiliary flutes |
USD840449S1 (en) | 2017-06-28 | 2019-02-12 | Gino Development, Inc. | Twisted drill bit tip |
US10265082B2 (en) | 2015-08-31 | 2019-04-23 | Medtronic Ps Medical, Inc. | Surgical burs |
US10335166B2 (en) | 2014-04-16 | 2019-07-02 | Medtronics Ps Medical, Inc. | Surgical burs with decoupled rake surfaces and corresponding axial and radial rake angles |
US20190375028A1 (en) * | 2018-06-12 | 2019-12-12 | Disston Company | Drill bit, such as an auger drill bit, and method therefore |
USD881957S1 (en) * | 2019-06-27 | 2020-04-21 | Hongjia Wang | Twist drill |
US11117200B2 (en) | 2016-10-21 | 2021-09-14 | Kyocera Sgs Precision Tools, Inc. | Drills and methods of using the same |
US11511359B2 (en) * | 2018-03-28 | 2022-11-29 | Kyocera Corporation | Drill and method of manufacturing machined product |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5338135A (en) * | 1991-04-11 | 1994-08-16 | Sumitomo Electric Industries, Ltd. | Drill and lock screw employed for fastening the same |
US5931615A (en) * | 1997-04-03 | 1999-08-03 | Credo Tool Company | Twist drill bit |
SE519728C2 (sv) * | 1998-08-13 | 2003-04-01 | Sandvik Ab | Spiralborr och polygonalt indexerbart skär med släppningsytor med skiljda vinklar |
US6135681A (en) * | 1998-08-21 | 2000-10-24 | Allied Machine & Engineering | Flat bottom tool |
US6443674B1 (en) | 2000-05-19 | 2002-09-03 | Ics Cutting Tools, Inc. | Self-centering twist drill having a modified flat bottom section and a helical crown point tip |
US9199315B2 (en) * | 2000-06-02 | 2015-12-01 | Kennametal Inc. | Twist drill and method for producing a twist drill which method includes forming a flute of a twist drill |
DE10042990A1 (de) * | 2000-09-01 | 2002-03-28 | Kennametal Inc | Rundlauf-Schneidwerkzeug, z. B. Bohrer |
SE525336C2 (sv) * | 2002-05-17 | 2005-02-01 | Sandvik Ab | Borrverktyg för hålborrning i metalliska material |
FR2850435B1 (fr) * | 2003-01-29 | 2007-07-13 | Prospection & Inventions | Cheville d'ancrage pour materiau friable |
US7237986B2 (en) | 2004-08-09 | 2007-07-03 | Black & Decker Inc. | High speed metal drill bit |
US7520703B2 (en) * | 2004-09-07 | 2009-04-21 | Black & Decker Inc. | Twist drill with a pilot tip |
KR100601323B1 (ko) | 2004-11-25 | 2006-07-13 | 주식회사 비-코리아 | 비대칭형 트위스트 드릴 |
US7556459B2 (en) * | 2005-11-07 | 2009-07-07 | Black & Decker Inc. | Hole saw having a drill bit with a pilot tip |
US20080019787A1 (en) * | 2006-07-24 | 2008-01-24 | Karthikeyan Sampath | Drill for machining fiber reinforced composite material |
DE102007044095A1 (de) * | 2007-09-14 | 2009-03-19 | Hartmetall-Werkzeugfabrik Paul Horn Gmbh | Bohrwerkzeug mit Bohrkrone |
DE102007000848A1 (de) * | 2007-10-11 | 2009-04-23 | Hilti Aktiengesellschaft | Selbstbohrschraube |
TWM338709U (en) * | 2007-11-29 | 2008-08-21 | King Drill Prec Tools Co Ltd | Multi-blade multi-screw groove drilling bit reinforcement structure |
WO2009114958A1 (zh) * | 2008-03-19 | 2009-09-24 | Li Shiqing | 螺旋刀具 |
GB201007032D0 (en) * | 2010-04-27 | 2010-06-09 | Dormer Tools Ltd | Twist drill for advanced materials |
JP5691424B2 (ja) * | 2010-11-17 | 2015-04-01 | 株式会社不二越 | ドリル |
DE102011001177B4 (de) * | 2011-03-09 | 2022-10-20 | Gühring KG | Mehrschneidiges Bohrwerkzeug |
GB2492583A (en) * | 2011-07-06 | 2013-01-09 | Sandvik Intellectual Property | Twist drill for composite materials |
CN202180241U (zh) * | 2011-07-11 | 2012-04-04 | 宁波华刃工具有限公司 | 通用型多刃尖钻 |
RU2687623C2 (ru) | 2014-06-03 | 2019-05-15 | Сандвик Интеллекчуал Проперти Аб | Способ изготовления режущего инструмента и режущий инструмент |
WO2016047803A1 (ja) * | 2014-09-26 | 2016-03-31 | 三菱マテリアル株式会社 | ドリル及びドリルヘッド |
US11007583B2 (en) | 2016-02-14 | 2021-05-18 | Hongjia Wang | Twist drill |
US11413690B2 (en) | 2016-04-15 | 2022-08-16 | Moldino Tool Engineering, Ltd. | Small-diameter drill bit |
DE102017101020A1 (de) | 2017-01-19 | 2018-07-19 | Sfs Intec Holding Ag | Bohrschraube |
CN111112700A (zh) * | 2020-01-18 | 2020-05-08 | 江苏爵克数控刀具有限公司 | 一种强力分屑钻 |
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US3125931A (en) * | 1964-03-24 | Method for forming helical flutes | ||
US1069930A (en) * | 1912-04-23 | 1913-08-12 | William R Down | Drill. |
GB123605A (en) * | 1918-03-05 | 1919-03-05 | Vickers Ltd | Improvements in or relating to Boring Tools. |
US1467491A (en) * | 1921-07-11 | 1923-09-11 | Edd C Oliver | Twist drill |
US2201159A (en) * | 1937-05-10 | 1940-05-21 | Philplug Products Ltd | Boring or drilling tool |
US2230645A (en) * | 1938-02-01 | 1941-02-04 | Western Electric Co | Drill |
US2193186A (en) * | 1938-06-06 | 1940-03-12 | Herbert G Hard | Twist drill |
US2328629A (en) * | 1940-07-29 | 1943-09-07 | United Shoe Machinery Corp | Drill |
US2404048A (en) * | 1944-08-05 | 1946-07-16 | Franklin G Gepfert | Drill |
US2600286A (en) * | 1947-09-08 | 1952-06-10 | Bell Machine Company | Drill bit |
US2805522A (en) * | 1954-11-15 | 1957-09-10 | Theodore S Dayton | Apparatus for sharpening wood bits |
US2817983A (en) * | 1956-03-02 | 1957-12-31 | Carl W Mossberg | Coolant type drilling tool |
US2996081A (en) * | 1956-06-29 | 1961-08-15 | Anderson Co | Multiple valve structure |
US2936658A (en) * | 1956-08-08 | 1960-05-17 | Oscar L Riley | Twist drill |
US2889725A (en) * | 1958-05-09 | 1959-06-09 | United Greenfield Corp | Carbide drill |
US2966081A (en) * | 1959-03-18 | 1960-12-27 | United Greenfield Corp | Drill |
US3089354A (en) * | 1959-10-30 | 1963-05-14 | Spiralbohrer Und Werkzeugfabri | Method for the production of cutting tools |
US3109270A (en) * | 1960-04-22 | 1963-11-05 | Cincinnati Milling Machine Co | Drill grinding method |
US3040605A (en) * | 1960-08-01 | 1962-06-26 | Rudolf W Andreasson | Drill |
US3116654A (en) * | 1961-05-15 | 1964-01-07 | Philip J Nider | Drill |
US3452625A (en) * | 1966-11-21 | 1969-07-01 | Peter Russo | Drill |
BE794210Q (fr) * | 1968-02-14 | 1973-05-16 | Radial Lip Machine Inc | Appareil a affuter les forets |
US3610075A (en) * | 1968-07-01 | 1971-10-05 | Illinois Tool Works | Method of producing a plurality of cutting tools from a single fluted bar |
DE1921677B2 (de) * | 1969-04-28 | 1977-09-29 | Hilti Ag, Schaan (Liechtenstein) | Drehschlag-wendelbohrer |
US3592555A (en) * | 1969-05-02 | 1971-07-13 | Radial Lip Machine Corp | Drill with discontinuous cutting lips |
US3680262A (en) * | 1969-11-03 | 1972-08-01 | Omark Winslow Co | End mill grinder |
DE7033288U (de) * | 1970-09-07 | 1971-08-12 | Desrondiers Bernard Rene | Spezialbohrer fuer duenne metalle. |
US3667857A (en) * | 1970-10-30 | 1972-06-06 | Nat Twist Drill & Tool Co | Combined drill and reamer construction |
US3848483A (en) * | 1972-07-17 | 1974-11-19 | Wall Machine Works | Method of making router bits |
FR2234749A5 (zh) * | 1973-06-20 | 1975-01-17 | Costil Marcel | |
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US4222690A (en) * | 1977-12-03 | 1980-09-16 | Ryosuke Hosoi | Drill having cutting edges with the greatest curvature at the central portion thereof |
DE7806211U1 (de) * | 1978-03-02 | 1979-08-09 | Komet Stahlhalter- Und Werkzeugfabrik Robert Breuning Gmbh, 7122 Besigheim | Bohrwerkzeug fuer bohrungen in metallvollmaterial von werkstuecken |
US4209275A (en) * | 1978-10-30 | 1980-06-24 | Kim Joo B | Twist drill |
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US4248555A (en) * | 1979-08-09 | 1981-02-03 | Showa Machine Industries Co., Ltd. | Drill assembly |
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IT1127526B (it) * | 1980-08-01 | 1986-05-21 | Aeritalia Spa | Punta da trapano per eseguire fori in laminati di materiale composito di fibre/resina |
DE3131794C2 (de) * | 1980-08-29 | 1986-08-07 | Toshiaki Osaka Hosoi | Bohrer |
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US4400119A (en) * | 1981-08-10 | 1983-08-23 | Burke Clement | Twist drill |
US4456411A (en) * | 1981-08-10 | 1984-06-26 | Burke Clement | Twist drill |
DE3205051C2 (de) * | 1982-02-12 | 1983-12-22 | Hermann Bilz Gmbh & Co, 7300 Esslingen | Bohrwerkzeug |
US4620822A (en) * | 1982-03-17 | 1986-11-04 | General Electric Company | Flat bottom hole drill |
DE3233968A1 (de) * | 1982-09-14 | 1984-03-15 | Hartmetallwerkzeugfabrik Andreas Maier GmbH + Co KG, 7959 Schwendi | Mehrlippenbohrer |
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JPS5981010A (ja) * | 1982-10-29 | 1984-05-10 | Nippon Oil & Fats Co Ltd | 穴明け工具 |
US4605347A (en) * | 1982-12-27 | 1986-08-12 | Lockheed Missiles & Space Company, Inc. | High speed drill reamer |
JPS59219108A (ja) * | 1983-05-25 | 1984-12-10 | Sumitomo Electric Ind Ltd | ドリル |
DE3344620A1 (de) * | 1983-12-09 | 1985-06-20 | Hartmetallwerkzeugfabrik Andreas Maier GmbH + Co KG, 7959 Schwendi | Mehrschneidenbohrer |
US4884571A (en) * | 1984-01-31 | 1989-12-05 | Intech, Inc. | Cranial perforator with reentrant cutting segment |
SU1238905A1 (ru) * | 1984-09-12 | 1986-06-23 | Харьковский Ордена Ленина Политехнический Институт Им.В.И.Ленина | Сверло дл сверлени полимерных композиционных материалов |
SU1278117A1 (ru) * | 1985-03-15 | 1986-12-23 | Предприятие П/Я А-1096 | Сверло |
FR2583667A1 (fr) * | 1985-06-19 | 1986-12-26 | Girouard Marc | Foret de percage pour materiaux d'usinage difficile |
DE3706282A1 (de) * | 1986-02-28 | 1987-09-03 | Izumo Sangyo Kk | Umlaufendes schneidwerkzeug |
US4968193A (en) * | 1986-08-18 | 1990-11-06 | Black & Decker Corporation | Self-centering drill bit with pilot tip |
US5011342A (en) * | 1988-03-14 | 1991-04-30 | 501 Greenfield Industries, Inc. | Twist drill |
-
1988
- 1988-03-14 US US07/168,074 patent/US5011342A/en not_active Expired - Lifetime
-
1989
- 1989-03-07 IL IL89523A patent/IL89523A0/xx unknown
- 1989-03-13 CA CA000593556A patent/CA1331296C/en not_active Expired - Fee Related
- 1989-03-13 MX MX015257A patent/MX166475B/es unknown
- 1989-03-13 ES ES8900899A patent/ES2013103A6/es not_active Expired - Lifetime
- 1989-03-14 JP JP1504010A patent/JPH04502884A/ja active Pending
- 1989-03-14 EP EP19890903903 patent/EP0406283A1/en not_active Withdrawn
- 1989-03-14 BR BR898907316A patent/BR8907316A/pt not_active IP Right Cessation
- 1989-03-14 WO PCT/US1989/001049 patent/WO1989008520A1/en not_active Application Discontinuation
- 1989-03-14 AU AU34393/89A patent/AU630608B2/en not_active Ceased
- 1989-11-14 KR KR1019890702116A patent/KR900700218A/ko not_active Application Discontinuation
-
1992
- 1992-09-30 US US07/954,141 patent/US5442979A/en not_active Expired - Lifetime
Cited By (65)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5288183A (en) * | 1986-08-18 | 1994-02-22 | Black & Decker Inc. | Self-centering drill bit with pilot tip |
US5442979A (en) * | 1988-03-14 | 1995-08-22 | Greenfield Industries, Inc. | Twist drill |
US5628837A (en) * | 1993-11-15 | 1997-05-13 | Rogers Tool Works, Inc. | Surface decarburization of a drill bit having a refined primary cutting edge |
WO1995013894A1 (en) * | 1993-11-15 | 1995-05-26 | Rogers Tool Works, Inc. | Surface decarburization of a drill bit having a refined primary cutting edge |
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Also Published As
Publication number | Publication date |
---|---|
BR8907316A (pt) | 1991-03-19 |
JPH04502884A (ja) | 1992-05-28 |
US5011342A (en) | 1991-04-30 |
AU3439389A (en) | 1989-10-05 |
AU630608B2 (en) | 1992-11-05 |
IL89523A0 (en) | 1989-09-10 |
EP0406283A1 (en) | 1991-01-09 |
KR900700218A (ko) | 1990-08-11 |
MX166475B (es) | 1993-01-12 |
EP0406283A4 (en) | 1990-11-12 |
ES2013103A6 (es) | 1990-04-16 |
WO1989008520A1 (en) | 1989-09-21 |
US5442979A (en) | 1995-08-22 |
CA1331296C (en) | 1994-08-09 |
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